Together is Better : mRNA Co-Encapsulation in Lipoplexes is Required to Obtain Ratiometric Co-Delivery and Protein Expression on the Single Cell Level

• Liposomes can efficiently deliver messenger RNA (mRNA) into cells. When mRNA cocktails encoding different proteins are needed, a considerable challenge is to efficiently deliver all mRNAs into the cytosol of each individual cell. In this work, two methods are explored to co-deliver varying ratiometric doses of mRNA encoding red (R) or green (G) fluorescent proteins and it is found that packaging mRNAs into the same lipoplexes (mingle-lipoplexes) is crucial to efficiently deliver multiple mRNA types into the cytosol of individual cells according to the pre-defined ratio. A mixture of lipoplexes containing only one mRNA type (single-lipoplexes), however, seem to follow the “first come – first serve” principle, resulting in a large variation of R/G uptake and expression levels for individual cells leading to ratiometric dosing only on the population level, but rarely on the single-cell level. These experimental observations are quantitatively explained by a theoretical framework based on the stochasticity of mRNA uptake in cells and endosomal escape of mingle- and single-lipoplexes, respectively. Furthermore, the findings are confirmed in 3D retinal organoids and zebrafish embryos, where mingle-lipoplexes outperformed single-lipoplexes to reliably bring both mRNA types into single cells. This benefits applications that require a strict control of protein expression in individual cells. © 2021 The Authors. 

Ämnesord

MEDICIN OCH HÄLSOVETENSKAP  -- Medicinska och farmaceutiska grundvetenskaper -- Cell- och molekylärbiologi (hsv//swe)

MEDICAL AND HEALTH SCIENCES  -- Basic Medicine -- Cell and Molecular Biology (hsv//eng)

NATURVETENSKAP  -- Biologi -- Cellbiologi (hsv//swe)

NATURAL SCIENCES  -- Biological Sciences -- Cell Biology (hsv//eng)

NATURVETENSKAP  -- Biologi -- Utvecklingsbiologi (hsv//swe)

NATURAL SCIENCES  -- Biological Sciences -- Developmental Biology (hsv//eng)

NATURVETENSKAP  -- Biologi -- Molekylärbiologi (hsv//swe)

NATURAL SCIENCES  -- Biological Sciences -- Molecular Biology (hsv//eng)

Nyckelord

cellular uptake

mingle/single-mRNA lipoplex

protein expression

single cell

theoretical modeling

Cells

Cytology

Encoding (symbols)

Proteins

RNA

Signal encoding

Individual cells

Lipoplexes

Messenger RNA

Mingle/single-messenger RNA lipoplex

Protein expressions

Ratiometric

Single cells

Single-cell level

Liposomes

cellular uptake

mingle

single-mRNA lipoplex

protein expression

single cell

theoretical modeling

mediated delivery

endosomal escape

sirna

integrity

polyplex

vaccine

Chemistry

Science & Technology - Other Topics

Materials Science

Publikations- och innehållstyp

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